private void Window_Loaded(object sender, RoutedEventArgs e)
        {
            Controller = new Controller();
            this.LoadSettings();
            if (string.IsNullOrEmpty(User.Email))
                mi_Log.Header = "Sign in";

        }
        private void Window_Loaded(object sender, RoutedEventArgs e)
        {
            Controller = new Controller();

        }
 private void WindowAddComposition1_Loaded(object sender, RoutedEventArgs e)
 {
     Controller = new Controller();
     RefreshComboboxes();
 }